Syzygy endgame tablebases

Black is losing with DTZ 143

This is a blessed loss. Mate can be forced, but a draw can be achieved under the fifty-move rule.


Histogram: KQBB winning vs. KQQ (log scale)

Longest KQBBvKQQ phases

KQBBvKQQ statistics (unique positions)

White wins:
73,255,125,086 (21.6%)
Frustrated white wins:
47,379,422 (0.0%)
66,887,261,032 (19.7%)
Frustrated black wins:
2,955,100,724 (0.9%)
Black wins:
196,135,819,030 (57.8%)
KQBBvKQQ.json (?)